RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4b2cbd6d4 R13: 00000000004be9e6 R14: 00000000004cee38 R15: 0000000000000005 ================================ WARNING: inconsistent lock state 4.20.0-rc1-next-20181109+ #110 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor1/3809 [HC0[0]:SC1[1]:HE1:SE0] takes: 0000000092f0f88c (fs_reclaim){+.?.}, at: fs_reclaim_acquire.part.97+0x0/0x30 mm/page_alloc.c:4806 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __fs_reclaim_acquire mm/page_alloc.c:3726 [inline] fs_reclaim_acquire.part.97+0x24/0x30 mm/page_alloc.c:3737 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3738 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x3c/0x740 mm/slab.c:3661 kmalloc_node include/linux/slab.h:584 [inline] kzalloc_node include/linux/slab.h:752 [inline] alloc_worker+0xc5/0x300 kernel/workqueue.c:1704 init_rescuer.part.24+0x1f/0x190 kernel/workqueue.c:4028 init_rescuer kernel/workqueue.c:4025 [inline] workqueue_init+0x491/0x744 kernel/workqueue.c:5794 kernel_init_freeable+0x3b8/0x6b4 init/main.c:1128 kernel_init+0x11/0x1ae init/main.c:1060 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 irq event stamp: 75526 hardirqs last enabled at (75526): [] console_unlock+0xcf6/0x1190 kernel/printk/printk.c:2443 hardirqs last disabled at (75525): [] console_unlock+0x2d9/0x1190 kernel/printk/printk.c:2353 softirqs last enabled at (75262): [] __do_softirq+0x7df/0xb7e kernel/softirq.c:319 softirqs last disabled at (75385): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (75385): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(fs_reclaim); lock(fs_reclaim); *** DEADLOCK *** 1 lock held by syz-executor1/3809: #0: 00000000bbc56dd0 (rcu_callback){....}, at: __rcu_reclaim kernel/rcu/rcu.h:228 [inline] #0: 00000000bbc56dd0 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2452 [inline] #0: 00000000bbc56dd0 (rcu_callback){....}, at: invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] #0: 00000000bbc56dd0 (rcu_callback){....}, at: rcu_process_callbacks+0xd50/0x15f0 kernel/rcu/tree.c:2754 stack backtrace: CPU: 0 PID: 3809 Comm: syz-executor1 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_usage_bug.cold.61+0x320/0x41a kernel/locking/lockdep.c:2472 valid_state kernel/locking/lockdep.c:2485 [inline] mark_lock_irq kernel/locking/lockdep.c:2679 [inline] mark_lock+0x1276/0x1cd0 kernel/locking/lockdep.c:3059 mark_irqflags kernel/locking/lockdep.c:2937 [inline] __lock_acquire+0x155f/0x4c20 kernel/locking/lockdep.c:3298 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __fs_reclaim_acquire mm/page_alloc.c:3726 [inline] fs_reclaim_acquire.part.97+0x24/0x30 mm/page_alloc.c:3737 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3738 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2d/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:546 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_uevent_env+0x2f3/0x101e lib/kobject_uevent.c:514 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 kobject: 'loop0' (000000007091c499): kobject_uevent_env kobject: 'loop0' (000000007091c499): fill_kobj_path: path = '/devices/virtual/block/loop0' exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2cd/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:546 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_uevent_env+0x2f3/0x101e lib/kobject_uevent.c:514 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.c:3066 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 cache_alloc_debugcheck_before mm/slab.c:3066 [inline] slab_alloc mm/slab.c:3382 [inline] kmem_cache_alloc_trace+0x307/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:546 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_uevent_env+0x2f3/0x101e lib/kobject_uevent.c:514 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2d6/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_get_path+0xc2/0x1b0 lib/kobject.c:171 kobject_uevent_env+0x314/0x101e lib/kobject_uevent.c:519 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.c:3066 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 cache_alloc_debugcheck_before mm/slab.c:3066 [inline] slab_alloc mm/slab.c:3382 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x310/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_get_path+0xc2/0x1b0 lib/kobject.c:171 kobject_uevent_env+0x314/0x101e lib/kobject_uevent.c:519 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff kobject: 'loop0p241' (00000000bf989dbe): fill_kobj_path: path = '/loop0p241' BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0x138/0x16f0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject_uevent_env+0x7d7/0x101e lib/kobject_uevent.c:580 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node+0x264/0x730 mm/slab.c:3642 __alloc_skb+0x114/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] alloc_uevent_skb+0x84/0x1da lib/kobject_uevent.c:288 uevent_net_broadcast_untagged lib/kobject_uevent.c:324 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:406 [inline] kobject_uevent_env+0xa52/0x101e lib/kobject_uevent.c:587 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.c:3066 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 cache_alloc_debugcheck_before mm/slab.c:3066 [inline] slab_alloc_node mm/slab.c:3303 [inline] kmem_cache_alloc_node+0x29e/0x730 mm/slab.c:3642 __alloc_skb+0x114/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] alloc_uevent_skb+0x84/0x1da lib/kobject_uevent.c:288 uevent_net_broadcast_untagged lib/kobject_uevent.c:324 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:406 [inline] kobject_uevent_env+0xa52/0x101e lib/kobject_uevent.c:587 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 exit_mm kernel/exit.c:545 [inline] do_exit+0xdeb/0x2620 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f3e65c41a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: 00000000001e8000 RBX: 0000000020000050 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000400 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000020000058 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000001 R14: 00000000004d8bd0 R15: 00000000ffffffff BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 0, pid: 3809, name: syz-executor1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb7e kernel/softirq.c:269 CPU: 0 PID: 3809 Comm: syz-executor1 Tainted: G W 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 ___might_sleep.cold.86+0x221/0x254 kernel/sched/core.c:6145 __might_sleep+0x95/0x190 kernel/sched/core.c:6098 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x266/0x740 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3683 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3698 __kmalloc_reserve.isra.38+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x150/0x770 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:997 [inline] alloc_uevent_skb+0x84/0x1da lib/kobject_uevent.c:288 uevent_net_broadcast_untagged lib/kobject_uevent.c:324 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:406 [inline] kobject_uevent_env+0xa52/0x101e lib/kobject_uevent.c:587 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc57/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0x21/0x1b0 mm/kasan/kasan.c:266 Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 11 01 00 00 4c 8d 5c 37 ff 48 89 fb 49 b9 00 00 00 00 00 RSP: 0018:ffff8801d7f3e2c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: ffff7fffffffffff RBX: ffffea00074ddcb4 RCX: ffffffff81a4a5e8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00074ddcb4 RBP: ffff8801d7f3e2d0 R08: ffff88018556e000 R09: fffff94000e9bb96 R10: fffff94000e9bb96 R11: ffffea00074ddcb7 R12: ffffea00074ddc80 R13: 0000000000000004 R14: ffff8801d7f3ea80 R15: dffffc0000000000 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 atomic_dec_and_test include/asm-generic/atomic-instrumented.h:747 [inline] page_ref_dec_and_test include/linux/page_ref.h:139 [inline] put_page_testzero include/linux/mm.h:520 [inline] release_pages+0x488/0x26a0 mm/swap.c:751 free_pages_and_swap_cache+0x475/0x6f0 mm/swap_state.c:295 tlb_flush_mmu_free+0xcf/0x170 mm/mmu_gather.c:74 zap_pte_range mm/memory.c:1158 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x2068/0x2930 mm/memory.c:1264